At least one more, if Alex hadn't missed his Oct 2nd shot at BB. IMO, that was when everything started to go wrong, because BB recognized Tylee's jeep, and hired a private eye to follow his wife, who lead them to Rexburg.
Alex became engaged to Zulema Nov 7, before the Nov 26 welfare check that sent the rats scurrying from the sinking ship.
Lori Vallow Daybell's Brother Alex Cox Told Wife, 'I Think I Am Their Fall Guy' the Night Before He Died
So, would there have been some people in Zulema's close family deemed to be dark, because they obstructed the grand plans and next steps?
Of course, would Alex have died anyway, even if police were not on his tail?
JMO